Locking arrangement for nuts, screws, &amp;c.



No. 868,622. PATENTED OCT. 15, 1907. 0. A. ABBEY.

LOCKING ARRANGEMENT FOB NUT$, SCREWS, 6w. APPLIOATION FILED MAR.16. 1907.

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Letters Patent.

FltANGE.

sossws, at.

Patented Oct Application Bled March 16, 190?. florist No. 382,661.

To all whom it may concern:

Be it known that I, OHAnLns Anruonsn Assure, accountant,.a citizen of the French Republic, and resid ing at 38 Rue Charles Nodicr, Besancon, Department of Doubs, France, have invented certain new and useful Improvements in Locking .irrangements for Nuts, Screws, and other Rotatable Devices, of which the following is a specification. I

The present arrangement relates to a locking arrange 'ment for nuts, studs, screws, cocks and other devices which it is desired to prevent from turning accidentally. The locking device of the arrangement consists of an elastic helix sprung upon a cylindrical or slightly conical portion of the nut or other object; the helix in its normal state constrin'ges the shank so as to lie in close'contact therewith. This helix is anchored at one extremity to a fixed object with relation to which the nut must not turn, for instance, to the object traversed by the bolt which receives the nut, and it is wound in a direction such that if its free extremity is turned. in the direction of the screwing of the nut, the helix uncoils, while if it is turned in the-direction of unscrew ing, the helix grips upon the cylindrical part of the nut and so opposes the unscrewing by .a constrictive frictional effect which increases in proportion to the force exerted upon the nut.

By way of example the annexed drawing shows two applications of the object of the invention.

Figure 1 is a section taken along the axis of a nonslacking nut screwed upon a bolt. Fig. 2 represents the nut, Fig. 3 its hclixcr coil, and Fig. 4 a releasing spanner separately in elevation. Fig. 5 indicates the helix and Fig. 6 shows the spanner in plan separately.

Fig. 7 is a section of a rail and fishplates assembled with bolts having non-slacking nuts with stop-washers.

Fig. 8 represents a washer.

The nut (Figs. 1 and 2) comprises a. fiat-sided head 1 and a cylindrical shank or portion 2. Around the lat-- ter is sprung the constringing elastic helix 3, one end 4 of which is cranked. In the object 5 through which the bolt 6 passes, a srhall cavity 7 is formed for instance by punching in order to receive the extremity 4 of the helix. When the nut is screwed up and the helix is stopped by the cavity 7, the friction of the cylindrical portion 2 against the helix tends to uncoil this latter, so that no appreciable resistance is opposed to the screwing of the nut. On the other hand, if it is attempted to unscrew the nut, the helixv carried round and tightened by friction, grips immediately upon it by its constrictive action and opposes any movement in this direction. Unscrewing or slackening is thus prevented automatically and with certainty. 'lo

. render it possible indeed it is necessary to press upon the free end 8 of the helix, for example by the aid of a suitable spanner 9 having a notch 10 arranged to fit inspection of F It will be lg. 5 that the so as to maintain this helix uncoiled noted from an end 8. of the helix is approximately tangential to the helixand the notch 10 in the key or spanner 9, is correspondingly shaped.

In the arrangement in extremity 4 washer 12 relation to the rail, for instance 1) dicated in Figs 7 and 8, the

of'the helix is engaged 'in a slot 11 in a which is itself prevented from turning with y means of a flat part ges of the latter or out projection.

uts of all kinds and' nuts, nuts Withsplitor perii'fi-atecl heads, etc., bolts, screws, valves andall other parts oi whicl vented.

the accidental rotation is to be pre- Having thus-described my invention what I claim as such and desire to secure by Letters Patent, is:'--

1. The combination with a rotatable nut hav stantinlly cy for said nut, ing oneend :1 other end of so on :1 id hell): being free stringing the shank on said rotatable nut.

2. The combination with .l rotntub portion made substanthilly cylindrie comprising an elastic helix surround sold helix lmvin a one end free log a sublliulrical shank portion, of a locking device said device comprising an elastic helix havdnpicd to be anchored and said helix conle nut having a shank (ll, of a locking device lug said shank portion, and having the opposite end cranked, said cranked end adapted to engage with o.

fixed body to which the rotatable nut is a constringing the as herein described.

shank oi the rotatable pplied, said helix nut, substantially 3. The combination with a rotatable out having a. shank portion of substantially cylindrical to vice for said nut, said device surrounding said shank portion, said bell end and a crank dricnl shank per device comprising an elastic liel and constringe the shank of said ed end, and a fixed body said bcl nut.

tinn, of a locking anchored to a-flxed body and the other anchored and free ends being so located th the helix from the anchored to the .free end direction in which the rotatable nut is n rota te.

5. The combination with a nut, of no t, said device table nut having :1 shank portion and adapted to having. a freeend being engaged with portion of an elastic bell shank on said no (bored to a fine comprising an elastic helix be constrlnged by the said fixed member, the helix being so located In the cranked to the free which the rotatable nut is atiou with a rotatable nut 11 body and the other end rm, of a locking decomprislng an elastic helix x havinga free having a cavity ix constrlnglug ng a cylindevice for said not said Ix adapted to surround nut and having one end end free, said at the path of represents the ot allowed tofixed member and o rotatable a locking device intermediate of Sn id member and and said rotacinbraced by the helix latter, said helix and a cranked end, said cranked end and The free and that the path end represents not allowed to having a shank X, said helix constringlng the t and havingone end adopted to he ani'ree, said an- .helix tltiilllttti tn he released by :1 key when it is desired to g-hnred to the free end represents the direction in which said hotly is not allowed by the censtringent helix to rotate. the tangential end of the helix being adapted for engagement with a key when it is desired to rotate the nut in :t direction in which sttid member is not allowed by rutzite the rotatable nut in said direction. the (-onstringent helix to rotate.

(hm-ed and free ends being so located that the path of the l l T. The t 'll'nilinfttiOll with it rotatable nnt having: a shank in witness whereof I afiix my signature in presence of 20 ht-lix from the anchored to the free end represents the tlireciiun in which the rotatable nut is not allowed by the mnstringvnt helix to rotate. the constringent effect of the jtUlilUiL of a locking device for sztid nut, said device cnnttwn witnesses. prising an elastic helix constt'ing'int: the shank of said ntttt :titi heiis: having; one end adapted to he anchored to :t fixed lmzlr and one end free. said free end being disposed tangentially in said helix. and said tint-hnred and free ends 'Sllt'tl that thtpath of the helix from the UP CHARLES ALI 'IIOXSI'I ABBEY.

Witnesses 1 [twin-1t) DT'I'LY. luxttzt, \Ynnntitxx 

